I have make a lightning radar long range 2000-3000 km over the land,and more over the sea .The original
consept and design is from Frank Kooiman.
Here i have photos how i making,the design of the electronic circuit is from
Daniel.

Here is how start to make the antenna loop.I use 3 woods 2,5 x 2,5 cm ,and two of them horizontal it have lenght 105 mm,and third vertical 140 mm,because it need little more lenght for base keeper